Osama Bin Laden has extreme beliefs for his religion, Islam.
He has called for a holy war against America.
He dislikes America because he thinks they helped the people he insists on describing as enemies of his religion - the Israeli Jews - during wars in the Middle East.
Fact File
Bin Laden facts
Born in 1957
17th son of very rich family
Grew up in Jeddah, Saudi Arabia
Has more than 50 brothers and sisters
Osama Bin Laden is a very rich man.
He is the leader of a group called al-Qaeda. He has thousands of followers.
He is thought to be behind other attacks including a bombing at the World Trade Center in 1993 and car bombings outside the US Embassies in Kenya and in Tanzania.
